SPECIFICATION - Blackhorsemodel

SPECIFICATION

Made in Vietnam.

Wingspan : 170 cm 66.93 in. Length : 156 cm 61.42 in. Weight : 3.9 Kg 8.58 Lbs. Engine : 120 Two stroke. 120 Four stroke. Radio : 6channels. Servo : 6 servos.

ITEM CODE: BH48.

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YAK 54 - ITEM CODE: BH48. Instruction Manual

This instruction manual is designed to help you build a great flying aeroplane. Please read thismanual thoroughly before starting assembly of your YAK 54. Use the parts listing below to identifyall parts.

WARNING.

Please be aware that this aeroplane is not a toy and if assembled or used incorrectly it iscapable of causing injury to people or property. WHEN YOU FLY THIS AEROPLANE YOUASSUME ALL RISK & RESPONSIBILITY.

If you are inexperienced with basic R/C flight we strongly recommend you contact your R/C supplierand join your local R/C Model Flying Club. R/C Model Flying Clubs offer a variety of trainingprocedures designed to help the new pilot on his way to successful R/C flight. They will also be ableto advise on any insurance and safety regulations that may apply.

TOOLS & SUPPLIES NEEDED.

Thick cyanoacrylate glue. 30 minute epoxy. 5 minute epoxy. Hand or electric drill. Assorted drill bits. Modelling knife. Straight edge ruler. 2mm ball driver. Phillips head screwdriver. 220 grit sandpaper. 90° square or builder’s triangle. Wire cutters. Masking tape & T-pins. Thread-lock. Paper towels.

Some more parts.

HARDWARE PACK

COWLING.Landing gear.....

To avoid scratching your new airplane, do notunwrap the pieces until they are needed forassembly. Cover your workbench with an oldtowel or brown paper, both to protect the air-craft and to protect the table. Keep a couple ofjars or bowls handy to hold the small parts af-ter you open the bag.

Please trial fit all the parts. Make sure you havethe correct parts and that they fit and arealigned properly before gluing! This will assureproper assembly. YAK 54 ARF is hand madefrom natural materials, every plane is uniqueand minor adjustments may have to be made.However, you should find the fit superior andassembly simple.The painted and plastic parts used in this kitare fuel proof. However, they are not tolerantof many harsh chemicals including the follow-ing: paint thinner, C/A glue accelerator, C/A gluedebonder and acetone. Do not let these chemi-cals come in contact with the colors on thecovering and the plastic parts.

PARTS LISTING.

FUSELAGE ASSEMBLY (1) Fuselage.

WING ASSEMBLY

(1) Right wing half with pre-installedaileron.

(1) Left wing half with pre-installedaileron.

Tail section assembly

(1) Vertical stabilizer with pre-installed rudder.

(1) Horizontal stabilizer with pre-installed elevator halves.

SUGGESTION.

NOTE.

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+ This is not a toy + Be sure that no other flyers are using yourradio frequency. + Do not smoke near fuel + Store fuel in a cool, dry place, away fromchildren and pets. + Wear safety glasses. +The glow plug clip must be securely attachedto the glow plug. + Do not flip the propeller with your fingers. + Keep loose clothing and wires away fromthe propeller. + Do not start the engine if people are near.Do not stand in line with the side of the propel-ler. + Make engine adjustments from behind thepropeller only. Do not reach around the spin-ning propeller.

SAFETY PRECAUTION.

1. Install the rubber grommets and brasseyelets onto the aileron servo.

INSTALLING THE AILERON SERVOS.

Caution: this model is not a toy!If you are a beginner to this type of poweredmodel, please ask an experienced model flyerfor help and support. If you attempt to operatethe model without knowing what you are doingyou could easily injure yourself or somebodyelse. Please keep your safety and well-beingin mind at all times.

Important: before you start constructionEven if you have already built a large numberof RC models please read right through theseinstructions and check all the kit componentsagainst the parts list. We have taken greattrouble to keep construction as simple aspossible, without making any compromisesin the area of safety.

Note regarding the film coveringMinor creases or bubbles may develop in thefilm covering due to major fluctuations inweather conditions (temperature, humidityetc.); in rare cases you may even find a slightwarp in a component. These minor faults arein the nature of film-covered built-up woodenstructures, and can easily be corrected usinga heat gun, as commonly used for modelling.Creases: Blow warm air over the area

and rub down with a softcloth.

Wing warp: Hold the panel twistedgently in the oppositedirection to the warp, andapply warm air to removethe creases from thecovering.

Caution! do not heat the film more than isabsolutely necessary. If the air or the iron istoo hot, the film may melt and holes may beformed.

This model is highly pre-fabricated and canbe built in a very short time. However, the workwhich you have to carry out is important andmust be done carefully. The model will onlybe strong and fly well if you complete yourtasks competently - so please work slowlyand accurately.

When self-tapping screws have to bescrewed into wood, apply a little whiteglue to prevent them shaking loose: justsquirt white glue into the hole and fit thescrew.

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C/A glue.

C/A glue.

2. Using a modeling knife, remove the cov-ering at possition show below.

Remove thecovering.

Bottom of wing.

4. Drill 1,5mm pilot holes through the blockof wood for each of the four mounting screwsprovided with the servo. Install servo into ai-leron servo tray as same as picture below.

3. Using the thread as a guide and usingmasking tape, tape the servo lead to the endof the thread: carefully pull the thread out.When you have pulled the servo lead out,remove the masking tape and the servo leadfrom the thread.

Repeat the procedure for the other winghalf.

4. Using the thread as a guide and usingmasking tape, tape the servo lead to the endof the thread: carefully pull the thread out.When you have pulled the servo lead out,remove the masking tape and the servo leadfrom the thread.

Thread.

Electricwire.

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INSTALLING THE AILERON CONTROL HORN.

. Install aileron control horn as same aspicture below.

Control horn of Aileron

Remove thecovering.

Aileron Control horn

3x40mm.

Nilon control clasp.

M3 lock nut.

Install aileron control horn as sameas picture below.

Control horn.

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Bottom side.

Secure

C/A glue.

Repeat the procedure for the otherwing half.

Installing the aileron linkages as pictures below.

INSTALLING THE AILERONLINKAGES.

M3 M3 lock nut

Repeat the procedure for the other winghalf.

INSTALLING THE ENGINE MOUNT.

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Cut

C/A glue.

INSTALLING THE STOPPER ASSEMBLY

FUEL TANK.

4x30mm

Engine mount

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1. The stopper has been pre-assembled at the factory.

2. Using a modeling knife, cut one length ofsilicon fuel line (the length of silicon fuel line iscalculated by how the weighted clunk shouldrest about 8mm away from the rear of the tankand move freely inside the tank). Connect oneend of the line to the weighted clunk and theother end to the nylon pick up tube in the stop-per.

3. Carefully bend the second nylon tube upat a 45 degree angle (using a cigarette lighter).This tube will be the vent tube to the muffler.

4. Carefully bend the third nylon tube downat a 45 degree angle (using a cigarette lighter).This tube will be vent tube to the fueling valve.

When the stopper assembly is installedin the tank, the top of the vent tube shouldrest just below the top surface of the tank.It should not touch the top of the tank.

5. Test fit the stopper assembly into thetank. It may be necessary to remove someof the flashing around the tank openingusing a modeling knife. If flashing ispresent, makesure none of it falls into the tank.

6. When satisfied with the alignment ofthe stopper assembly tighten the 3mm x20mm machine screw until the rubber stop-per expands and seals the tank opening. Donot over tighten the assembly as this couldcause the tank to split.

7. Using a modeling knife, cut 3 lengths offuel line 150mm long. Connect 2 lines to the2 vent tubes and 1 line to the fuel pickup tubein the stopper.

8. Feed three lines through the fuel tankcompartment and through the pre-drilled holein the firewall. Pull the lines out from behindthe engine, while guiding the fuel tank intoplace. Push the fuel tank as far forward aspossible, the front of the tank should just abouttouch the back of the firewall.

silicon tube not included.

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Do not secure the tank into place per-manently until after balancing theairplane. You may need to remove thetank to mount the battery in the fuel tankcompartment.

Blow through one of the lines to ensurethe fuel lines have not become kinked insidethe fuel tank compartment. Air should flowthrough easily.

9. To secure the fuel tank in place, apply abead of silicon sealer to the forward area ofthe tank, where it exits the fuselage behindthe engine mounting box and to the rear ofthe tank at the forward bulkhead.

Fuel tank tray.

Fuel tank.

Locate the long piece of wire used for thethrottle pushrod. One end of the wire has beenpre-bend in to a “Z” bend at the factory. This“Z” bend should be inserted into the throttlearm of the engine when the engine is fittedonto the engine mount. Fit the engine to theengine mount using the screws provided.

C/A glue.

INSTALLING THE ENGINE-THROTTLE.

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13.5cm.

Mark point.

Secure

Drill 2mm hole

COWLING.

1. Slide the fiberglass cowl over the en-gine and line up the back edge of the cowlwith the marks you made on the fuselage.

Pushrod wire.

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Bottom side.

Trim and cut.Right side.

Trim and cut.Bottom side.

Right side.

2. While keeping the back edge of thecowl flush with the marks, align the front ofthe cowl with the crankshaft of the engine.The front of the cowl should be positioned sothe crankshaft is in nearly the middle of thecowl opening. Hold the cowl firmly in placeusing pieces of masking tape.

Left side.

4. Install the muffler and muffler exten-sion onto the engine and make the cutout inthe cowl for muffler clearance. Connect thefuel and pressure lines to the carburetor, muf-fler and fuel filler valve.

3. Slide the cowl back over the engineand secure it in place using four wood screws.See picture below.

Top side.

3x12 mm.

Machine screw.

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Install the spinner backplate, propellerand spinner cone. The spinner cone is heldin place using two 3mm x 15mm woodscrews.

INSTALLING THE SPINNER.

3 x 12mm.

MAIN GEAR INSTALATION.PARTS REQUIRED

1. Assemble and mounting the wheelpants as shown in the following pictures.

Drill 8mm hole

Drill 5mm hole

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2. A drop of C/A glue on the wheel collarscrews will help keep them from coming loseduring operation. Repeat the process for the other wheel.

INSTALLING THE MAIN LANDING GEAR.

1. The blind nuts are already mountedinside the fuselage. 2. The holes in the landing gear shouldbe to accept the mounting bolts.

3. Using the hardware provided, mountthe main landing gear to the fuselage.

Repeat the procedure for the otherwheel pant .

Landing gear.

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Secure.

1. Set the tail wheel assembly in placeon the plywood plate. The pivot point of thetail wheel wire should be even with the rud-der hinge line and the tail wheel bracketshould be centered on the plywood plate.2. Using a pen, mark the locations of thetwo mounting screws. Remove the tail wheelbracket and drill 1mm pilot holes at the loca-tions marked.

3x12mm

MOUNTING THE TAIL WHEELBRACKET.

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INSTALLING THE FUSELAGESERVOS.

1. Install the rubber grommets and brasscollets into the elevator servo. Test fit theservo into the servo tray. 2. Mount the servo to the tray using themounting screws provided with your radiosystem.

Remove the covering

Throttle servo.

Rudder servo

elevator servo right side

elevator servo left side

Horizontal stabilize installation .See picture below.

HORIZONTAL STABILIZER INSTALLATION.

Center line.

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1. Using a modeling knife, cut away the covering from the fuselage for the stabilizer and remove it.

C/A glue.

C/A glue.

2. Draw a center line onto the horizontalstabilizer. Then put the horizontal into the fuselarge.

3. Mark the shape of the vertical on theleft and right sides onto the horizontal stabi-lizer using a felt-tip pen

Center line.

Top elevator.

Center line.

Bottom elevator.

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4. Remove the stabilizer. Using the linesyou just drew as a guide, carefully removethe covering from between them using amodeling knife. When cutting through the covering toremove it, cut with only enough pressureto only cut through the covering it’s self.Cutting into the balsa structure mayweaken it. This could lead to possible fail-ure during flight

Bottom side.

Remove covering.

5. When you are sure that everything isaligned correctly, mix up a generous amountof 30 minute epoxy. Apply a thin layer to thetop and bottom of the stabilizer mounting areaand to the stabilizer mounting platform sidesin the fuselage. Slide the stabilizer in placeand re-align. Double check all of your meas-urements one more time before the epoxycures. Remove any excess epoxy using apaper towel and rubbing alcohol and hold thestabilizer in place with T-pins or masking tape.

Check to mark sure the wing and stabi-lizer are paralell. If they are not, lightly sandthe opening in the fuselage for the stabilizeruntil the stabilizer is paralell to the wing.

Epoxy glue.

C/A glue.

6. After the epoxy has fully cured, re-move

the masking tape or T-pins used to hold thestabilizer in place and carefully inspect theglue joints. Use more epoxy to fill in anygaps that were not filled previously andclean up the excess using a paper towel andrubbing alcohol.

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ELEVATOR CONTROL HORNPUSHROD INSTALLATION.

Elevator control horn install as same as theway of aileron control horn. Please see pic-tures below.

Control horn of elevator.

3mm x 30mm.

M3 lock nut.


C/A glue.

Removercovering

Removercovering

ELEVATOR PUSHDRODINSTALLATION

Elevator pushrod install as same as theway of aileron pushrod.

Elevatorpushrod.

Elevatorpushrod.

Elevatorcontrol horn

Elevatorcontrol horn

Bottom side of elevator.

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VERTICAL INSTALLATION.

C/A glue.

Vertical stabilizer installation See picture below.

Hinge.

1. Using a modeling knife cut away thecovering from the end of fuselage for the rud-der hinge.

3. Mark the shape of the vertical on theleft and right side on the rudder using a felt-tip pen.

2. Put the rudder into the fuselage assame as picture below.

C/A glue.

C/A glue.

Hinge slot.

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4. Now, remove the rudder and using amodeling knife, carefully cut just inside themarked lines and remove the film of the rud-der. Just as you did with the horizontal stabi-lizer, make sure you only press hard enoughto cut the film, not the balsa rudder.

Pen.

Removecovering.

Also carefully remove the covering frombelow the lines as you drew as same picturebelow.

Epoxy glue.

5. Put the vertical stabilizer back inplace. Using a triangle, check to ensurethat the vertical stabilizer is aligned 90 de-gree to the horizontal stabilizer.

Epoxy glue.

6) When you are sure that everything isa aligned correctly, mix up a generousamount of 30 minute epoxy. Apply a thin layerto the slot in the mounting platform and tothe vertical stabilizer mounting area. Applyepoxy to the lower rudder hinge. Set the sta-bilizer in place and re-align. Double checkall of your measurements once more be-fore the epoxy cures. Remove any excessepoxy using a paper towel and rubbing al-cohol and hold the stabilizer in place with T-pins or masking tape. Allow the epoxy to fullycure before proceeding.

C/A glue.

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RUDDER CONTROL HORN INSTALLA-TION.

Rudder control horn install as same as theway of aileron control horn. Please see pic-tures below.

Control horn of Rudder.

Rudder push-pull system install as sameas picture below

RUDDER PUSHROD INSTALLATION.

1. Rudder pushrod install as same asthe way of aileron control horn.

2. Rudder push - pull system install assame as picture below.

M3 clevis ( 4pcs for push - pull system ).

M3 lock nut.


M3 lock nut.

3mmx60mm.

C/A glue.

Remove covering.

C/A glue.

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Rudder cable.

Ruddercontrol horn.

Ruddercontrol horn.

Rudder push-pullcable.

3. Secure the tail wheel bracket in placeusing three 3mm x 15mm wood screws. Becareful not to overtighten the screws.

secure.

Cut.

3X12mm

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INSTALLING THE THROTTLE PUSHROD.

Install one adjustable metal connectorthrough the third hole out from the center ofone servo arm, enlarge the hole in the servoarm using a 2mm drill bit to accommodate theservo connector. Remove the excess mate-rial from the arm.

Servo arm.

Conector.

Rudder cable.

After installing the adjustable metal connec-tor apply a small drop of thin C/A to the bot-tom nut. This will prevent the connector fromloosening during flight.

Throttle pushrod.

Throttle servo.

1. Cut out the switch hole using a modelingknife. Use a 2mm drill bit and drill out the twomounting holes through the fuselage side.

2. Secure the switch in place using thetwo machine screws provided with the radiosystem.

INSTALLING THE SWITCH.

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3. Position the battery pack and receiverbehind the fuel tank. Use two tie wraps to holdthe battery and receiver securely in place. Aspictures below. Do not permanently secure the receiver andbattery until after balancing the model.

4. Using a 2mm drill bit, drill a hole throughthe side of the fuselage, near the receiver, forthe antenna to exit.

1. Plug the servo leads and the switchlead into the receiver. You may want to plugan aileron extension into the receiver to makeplugging in the aileron servo lead easierwhen you are installing the wing . Plug thebattery pack lead into the switch.

2. Wrap the receiver and battery pack inthe protective foam to protect them from vi-bration. Use a rubber band or masking tape tohold the foam in place.

INSTALLING THE RECEIVER AND BATTERY.

Switch

Rudder push-pullcable.

Battery

Tie wrap.

Receiver

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2. Locate the aluminium wing dihedralbrace.

WING ATTACHMENT.

1. Using a modeling knife, remove the cov-ering fuselage.

3.Test fit the dihedral brace into fuselage. Secure the wing and fuse large throughwing bolts as picture below.

Wing bolt.

Wing bolt.

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Installing the canopy as same as picture below

3. Turn the airplane upside down. Placeyour fingers on the masking tape and care-fully lift the plane .

1) It is critical that your airplane be bal-anced correctly. Improper balance will causeyour plane to lose control and crash.

THE CENTER OF GRAVITY IS LOCATED110mm BACK FROM THE LEADING EDGEOF THE WING.

2) Mount the wing to the fuselage. Using acouple of pieces of masking tape, place themon the top side of the wing 110mm back fromthe leading edge, at the fuselage sides.

BALANCING.

Accurately mark the balance point on the topof the wing on both sides of the fuselage. Thebalance point is located 110mm back from theleading edge. This is the balance point at whichyour model should balance for your first flights.Later, you may wish to experiment by shiftingthe balance up to 10mm forward or back tochange the flying characteristics. Moving thebalance forward may improve the smooth-ness and arrow- like tracking, but it may thenrequire more speed for take off and make itmore difficult to slow down for landing. Movingthe balance aft makes the model more agilewith a lighter and snappier ”feel”. In any case,please start at the location we recommend .

With the wing attached to the fuselage, allparts of the model installed ( ready to fly), andempty fuel tanks, hold the model at themarked balance point with the stabilizer level.

Lift the model. If the tail drops when youlift, the model is “tail heavy” and you must addweigh* to the nose. If the nose drops, it is “noseheavy” and you must add weight* to the tail tobalance.

*If possible, first attempt to balance the modelby changing the position of the receiver bat-tery and receiver. If you are unable to obtaingood balance by doing so, then it will be nec-essary to add weight to the nose or tail toachieve the proper balance point.

CG110mm

Secure the canopy frame.

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1) Completely charge your transmitter andreceiver batteries before your first day of fly-ing.

2) Check every bolt and every glue joint inyour plane to ensure that everything is tightand well bonded.

3) Double check the balance of theairplane.

4) Check the control surface.

5) Check the receiver antenna . It shouldbe fully extended and not coiled up inside thefuselage.

6) Properly balance the propeller.

We wish you enjoy.

PRE-FLIGHT CHECK.

Ailerons : 30mm up 30mm down Elevator : 30mm up 30mm down Rudder : 50mm right 50mm left

1) We highly recommend setting up aplane using the control throws listed.

2) The control throws should be meas-ured at the widest point of each control sur-face.

3) Check to be sure the control surfacesmove in the correct directions.

CONTROL THROWS.

Ailerons Control

3030

3030

5050

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Documents

SPECIFICATION - Blackhorsemodel